/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.shell.bjorne;
import org.jnode.shell.AbstractCommand;
import org.jnode.shell.Command;
import org.jnode.shell.CommandLine;
import org.jnode.shell.ShellException;
import org.jnode.shell.ShellInvocationException;
import org.jnode.vm.VmExit;
/**
* Bjorne builtin commands must extend this class. Each one should define a static final
* FACTORY object that assembles a BjorneBuiltinCommandInfo instance including an
* instance of the command object and the command's syntax bundle.
*
* @author crawley@jnode.org
*
*/
abstract class BjorneBuiltin extends AbstractCommand {
static interface Factory {
BjorneBuiltinCommandInfo buildCommandInfo(BjorneContext context);
}
private BjorneContext parentContext;
public BjorneBuiltin(String description) {
super(description);
}
/**
* Temporary adapter method. Unconverted builtin classes override this.
*/
int invoke(CommandLine command, BjorneInterpreter interpreter,
BjorneContext context) throws ShellException {
setParentContext(context.getParent());
initialize(command, command.getStreams());
try {
execute();
} catch (VmExit ex) {
return ex.getStatus();
} catch (Exception ex) {
throw new ShellInvocationException("Exception in bjorne builtin", ex);
}
return 0;
}
void error(String msg, BjorneContext context) {
context.resolvePrintStream(context.getIO(Command.STD_ERR)).println(msg);
}
void setParentContext(BjorneContext parentContext) {
this.parentContext = parentContext;
}
BjorneContext getParentContext() {
return parentContext;
}
}